Method of and means for preventing oxidation of rolled material.



B. P. HAZELTINE; METHOD DE AND MEANs FOR PREVENTIND OXIDATION OF RDLLED MATERlAL.

APPLICATION FILED OCT. 5. I9I6.

Patented Mur. 4,1919.

paratus,

UNITED STATES PATENT' oEEIcE.

BENJAMIN' P. HAZELTINE, 0F WHEELING, WEST VIRGINIA, .ASSIG-NOR T0 NATIONAL TUBE COMPANY, 0F JERSEY.I

PITTSBURGH, PENNSYLVANIA, A. CORPORATION OF NEW METHOD 0F AND MEANS FOR PREVENTING-OXIDATION 0F ROLLED Specification of Letters Patent.

Patented Mar. 4,' 1919.

Application iiled October 5, 1916. Serial No. 123,875. f

To all whom t may' concern:

Beit known that I, BENJAMIN P. HAZEL- TINE, a citizen, of the United States, and resident of Wheeling, in 'the-county of Ohio and State of West Virginia, have invented certain new and useful Improvements 1n Methods of and Means for Preventing Oxidation of Rolled Material, of which the following is a specification.

My invention relates to the lmanufacture of steel and has particular reference to an improvement in a method of and meansfor preventing oxidation of metal flats and similar rolled metal shapes.

The desirability of some such method and means has ybeen heretofore recognized and patents have been granted on devices having this desirable object in view. For instance,

the patent to Daniels, N o. 1,108,144, of August 25, 1914, discloses a method and apthe idea disclosed in that patent being that of immersing the rolled material (in water afterpassing the finishing rolls.

My improvement has material advantages `over :that disclosed in any .prior patent in that it vprovides for .the productlon of an 'unoxidized material by the use ofa much more readily handled medium and the use of Aa simpler andV more economical mechanism.'V My invention contemplates the employment of a closed passageway for the to be considered. T

`rolled ving at suitable intervals a material from the'planisliing or En.- means for injectuantity of a,` gasxor vapor in quantities su cient to prevent oxidation and to gradually cool the ishing rolls, together with vmaterial to such extent that it will not voxidize upon being brought into contact with the air after emerging from the closed passageway.

The advantages in the use of such construction arise fromzthe fact that a much more economical mechanism may4 bepemployed inasmuch as the Aproblem of leakage of the cooling non-oxidizing mediumis vnot open ends at the entrance and exit points, atmospheric air beingiprevented from entering, due to the excess pressure ofthe me'- dium employed. as the non-oxidizing agentj The method and the means employed '1n carrying .out the /same will be better underas best shown in .thefopen ends in proportion to the law as to the diffusion he passageway may have I' stood by drawings, wherein- Figure 1 is a side elevation somewhat diagrammatic in form showing a mill adapted' ,thence to the repeater 12 and back between theV planishing rolls 13. After leaving the planishing rolls, the material enters the conduit 14 at the open end 15.' This conduit, Fig. 3, may be inthe form of a trough having a iiatiio'oralong which the material which is y,indicated at 16 is caused to travel. Feedlout pinch, rollers 17 serve to cause the travel lof, the material. In order to cool the material and to prevent its oxidation during such cooling, I provide headers 18 located adjacent to the conduit 14 and communicating 'therewith' by a plurality of small apertures 19. The headers are connected to a source of steam or gas supply through the inlet 20. After the material leaves the planishing rolls it immediately enters a reducing atmosphere and is cooled to the point at which no further oxidation will occur. A` relatively .small quantity of steam or gas will serve .to maintain the non-oxidizing atmosphere lin the conduit as only sufficient need be employed to prevent theentrance of atmospheric air atjthe open ends; if, therefore, the steam or -.gas be supplied at substantially atmospheric pressure, the escape of the fluid from of the container will only be of gases. 'Thereforea relatively small quantity of the reducing element need be employed. This method has considerable advantage over that which employs the liquid as a cooling medium.

I claim: l

1. The method of'finishing rolled metal products which consists in rolling the products in, the usual manner and passing the reference Vto the accompanying rolled product from between the finishing rolls directly into an atmosphere of steam to prevent oxidation thereof while cooling, and enveloping the product in such atmosphere while cooling it to below the point at which oxidation occurs, substantially as described.

2. In apparatus for finishing rolledv metal products, the combination with the finishing rolls of an inclosed trough having open ends and arranged to receive the rolled metal as it emerges from said finishing rolls, means for creating a current, of elastic fluid within said trough t0 exclude air and maintain a non-oxidizing atmosphere therein, and

' means for causing the rolled metal to travel through said trough, substantially as de.

scribed.

3. In apparatus for finishing rolled metal products, the combination with the finishing rolls of an inclosed trough having open ends and arranged to receive the rolled metal as it emerges from said finishing rolls, means for creating a current f elastic iuid within said trough to non-oxidizing atmosphere therein, said trough being made in sections and having means between adjoining ends of at least part of said trough sections for causing travel of the metal through said trough, substantially as described. A

4., Apparatus of the character described, comprislng, in combination, planishing rolls, a long open-ended trough mounted at the discharge end of said rolls, a header communicating with said trough by a plurality exclude air and maintain a of small apertures and a source oi, gaseous Y fluid connected to said header, as described.

Signed at Wheeling, W. Va., this 26 day of September, 1916.

,BENJAMIN `l. HAZELTINE. Witnesses:

GIBSON L. CALDWELL, J M. PATTON.

substantially 

